Conveying device for a plant for the production of cement

Abstract

A conveying device for conveying bulk material for a plant for producing cement clinker, wherein the plant operates in the recirculation process and/or in the oxy-fuel process, and wherein the conveying device has a connection to the plant, in which the bulk material to be transported passes into the plant. A connection between the conveying device and the plant for producing cement clinker has a gas supply for pressurizing the connection with recirculation gas.

1 .- 6 . (canceled) 
     
     
         7 . A device for conveying bulk material for a plant producing cement clinker, wherein the plant for the production of cement clinker operates in a recirculation process, or an in an oxy-fuel process, or in both, the device comprising:
 a connection with the plant, in which a bulk material to be transported passes into the plant, wherein the connection comprises a gas supply for pressurizing the connection with a recirculation gas.   
     
     
         8 . The device according to  claim 7 , wherein the device is a bucket elevator which has a feeding device at an outlet,
 wherein the feeding device has a tapered cross-section at a transition to the plant compared to an mean cross-sectional area and on which a cone of the bulk material is formed during conveying of the bulk material, which empties into the transition.   
     
     
         9 . The device according to  claim 8 , wherein the gas supply is arranged such that the recirculation gas flows into the bulk material cone and expels trapped atmospheric air from the bulk material. 
     
     
         10 . The device according to  claim 8 , further comprising:
 a regulating device which regulates a speed of the bucket elevator as a function of a height of the cone of bulk material,   wherein the speed of the bucket elevator decreases as the height of the bulk material cone increases and, conversely, the speed of the bucket elevator increases as the height of the bulk material cone decreases.   
     
     
         11 . The device according to  claim 8 , a cross-sectional area of the tapered cross-section is configured to be adjusted from an outside by at least one sliding plate. 
     
     
         12 . The device according to  claim 7 , further comprising a gas supply configured to feed a freeboard space of individual buckets with recirculation gas.